Re: [dpdk-dev] DPDK qos support for 40G port

[Kevin Yan <Kevin.Yan@mavenir.com>]

Thanks, Cristian

-----Original Message-----
From: Dumitrescu, Cristian [mailto:cristian.dumitrescu@intel.com]
Sent: Friday, August 18, 2017 7:24 PM
To: Kevin Yan <Kevin.Yan@mavenir.com>; dev@dpdk.org
Subject: RE: DPDK qos support for 40G port

Hi Kevin,

> Hi Cristian,
> Sorry to bother again, could you give suggestions/hints of code change
> to support single 40G port?  Because  in our setup, we will use single
> 40G port (Intel XL710) as the network interface.
>
> Or is there any workaround to bypass the limitation?(we are not
> willing to use 4*10G setup)
>
> Thanks.
>

Probably the easiest thing to do as workaround to support single port of 40GbE rate is to change the code so that each credit is equivalent to 2 bytes instead of one. This is likely to result in some scheduling accuracy loss, but it can be implemented relatively quickly while avoiding complex code changes.

Regards,
Cristian

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